A saturated-liquid mixture of 70 mol% benzene and 30 mol%toluene, whose relative volatility is 2.5, is to be distilled at 1 atm to produce a distillate of 80 mol% benzene.Continuous distillation in a column containing the equivalent of two equilibrium plates. The feed is sent to the direct-heated still, from which residue is withdrawn continuously. The vapors from the top plate enter the top of a helically coiled partial condenser that discharges into a trap.The liquid from the trap is returned tothe bottom platewhile the uncondensed vapor is condensedto a distillate containing 80 mol% benzene. The molar ratio of reflux to product is 0.5. Calculate and tabulate: (a) moles of distillate per 100 moles of feed, (b) moles of total vapor generated per mole of distillate, and (c) mol% benzene in the residue. (d) For each part, construct a y–x diagram. On this, indicate the compositions of the overhead product, the reflux, and thecomposition of the residue.
A saturated-liquid mixture of 70 mol% benzene and 30 mol%toluene, whose relative volatility is 2.5, is to be distilled at 1 atm to produce a distillate of 80 mol% benzene.Continuous distillation in a column containing the equivalent of two equilibrium plates. The feed is sent to the direct-heated still, from which residue is withdrawn continuously. The vapors from the top plate enter the top of a helically coiled partial condenser that discharges into a trap.The liquid from the trap is returned tothe bottom platewhile the uncondensed vapor is condensedto a distillate containing 80 mol% benzene. The molar ratio of reflux to product is 0.5. Calculate and tabulate: (a) moles of distillate per 100 moles of feed, (b) moles of total vapor generated per mole of distillate, and (c) mol% benzene in the residue. (d) For each part, construct a y–x diagram. On this, indicate the compositions of the overhead product, the reflux, and the
composition of the residue.
Trending now
This is a popular solution!
Step by step
Solved in 9 steps with 14 images
